In May 2007 I did a trek in Tibet to reach Mt. Everest Advanced Base Camp (Camp III) at an altitude of about 6400m. The trail starts at Base Camp (5200m) and goes along East Rongbuk glacier, offering spectacular views of both the glacier structures and the north and north-east faces of Everest. We did not manage to reach Camp III, though, but reached an altitude ca. 6100 m, above Camp II.